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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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Turning on a 600W AC motor (PCB, circuit design)

I am looking for a bit of advice (or corrections). I need to turn on a 600W AC motor (220V 50Hz), just ON-OFF control. I plan to use the following circuit which AFAIK it should work well for resistive ...
b1063n's user avatar
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What encoder is this? [closed]

I don't understand what encoder this is, I only have this picture. I don't even know the motor on which I found it connected
KaleM's user avatar
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Capacitor ratings [closed]

If I have a 220V pool pump start capacitor rated 124-148 mf , how precise is that range? I am reading 152 mf, is that acceptable or id the capacitor bad?
harry von HarryVon's user avatar
2 votes
1 answer
62 views

I'm trying to wire this motor I have, but I'm not sure how to read this diagram

This motor is 110V or 220V. I'm trying to wire it up for 110 but I'm not 100% sure how. Is low std 110V and high 220V? I believe I need to connect 1,3,8 to hot and 2,4,5 to neutral and ground to the ...
Nick's user avatar
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1 answer
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Slew drive 12 volt motor with 7 wires

I have just acquired a slew drive for my solar tracker but it has 7 wires… 3 thick and 4 thin. The thick are positive negative and earth and the other 4 thin wires are for a controller. I don’t know ...
Mike2023's user avatar
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35 views

How to properly limit motor overspeed during regenerative torque

I are facing a potential issue and need some help with possible solutions. How to stop motor from over-speeding during a regenerative load, once maximum torque current limit is hit and the system's ...
AK47's user avatar
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1 vote
1 answer
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'Strange' behaviour due to DC motor

TLD: How do I minimise noise / electrical disruptions created by a DC motor? Situation I would like to control a DC motor through DMX512. Therefore I connected a Max485 chip to an Arduino to receive ...
Qwertis's user avatar
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1 answer
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Negative active power readings?

I am using a Fluke 434 Power Quality Analyser on a balanced load, on the supply side of a CNC machine. I am acquiring active, reactive & apparent power, see graph below. Would I be right to say ...
DrBwts's user avatar
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Relay controlling DC motor welding shut

I am controlling a fairly large DC motor using a relay. The motor draws approximately 7A at 36V. I am controlling it with a relay rated at 110VDC, 50A. To protect against back-EMF, I placed a ...
J.P.'s user avatar
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1 answer
32 views

Motor Direction standard nomenclature confusion

Does anyone know what is the standard nomenclature used when talking about motor direction? I see in some motor manuals the following are generally used: Forward, Reverse direction Clockwise, Counter-...
AK47's user avatar
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2 answers
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Is it possible to use just two SPDT relays to control this AC motor?

I purchased an inexpensive electric hoist off Amazon with the intention of partially replacing its control circuits so that it can controlled via ESPhome. There are only 2 buttons on the control box. ...
My other car is a cadr's user avatar
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AC Motor Control with TRIAC

I want to drive an AC motor using a TRIAC. I am new to this topic. I built this circuit and found that it is not working. What could be the reasons for this?
Burak Bayan's user avatar
1 vote
1 answer
58 views

Why fan motor doesn't spin freely after power is applied? [closed]

My Breville toaster oven convection fan stopped working. I took it apart to access the motor and it spins perfectly with no power. Zero resistance, silent, and takes a good 10 seconds to slow to a ...
MilkyTech's user avatar
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2 votes
1 answer
61 views

Problems trying to develop a stepper motor driver with TB6600

I am developing a stepper motor driver using the TB6600HG. However, when I plug the motor, all I hear is a faint buzzing sound, and the motor does not rotate. When I send commands to rotate, I can ...
Sérgio Beltrão's user avatar
3 votes
2 answers
319 views

Stepper Motor: Understanding why missed steps are multiples of 4

I’m trying to quantify the resolution of a stepper motor. Meaning, if I say travel to 500 steps, I want to define a window in which the stepper actually travels (say 495–505 steps). I realize this ...
FaulknerW's user avatar
1 vote
0 answers
67 views

How can I find out if High Frequency Injection (HFI) is being used in a Sensorless BLDC motor?

I have a small BLDC sensorless motor that runs at 34 V DC, reaches 40K RPM, has low resistance(5 ohms) between its phases. Its own driver manages to run this motor at really low speeds, 1K RPM, at ...
Rodrigo's user avatar
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2 answers
109 views

Can 3 power supplies safely share common ground?

I have a project with a DC motor @ 24V, an actuator @ 12V and an Arduino @ 5V. The motor and the actuator may draw several amps. The Arduino doesn't drive the motor nor the actuator, nor is it ...
MrSparkly's user avatar
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Designing a 4 H-bridge PCB board using a DRV8871

I want to make a 4 H-bridge PCB that consists of 4 DRV8871. I have seen the schematic that Adafruit has posted for their design and looks suitable for my case. So my idea was to repeat their module 4 ...
Alji2124's user avatar
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0 answers
43 views

MCU surge protection when controlling AC blinds motor using relay

I'm designing a very simple module to control blinds AC motor with MCU through relay: (I tried bunch of various schematics,not sure which one so attach. Adding diagram instead) When MCU enables the ...
x_arrange's user avatar
0 votes
2 answers
54 views

Can one connect 2 or more DC motors of same or different excitations in series or parallel combination,and how does it work [closed]

I am trying to understand DC motors,but i had this doubt throughout the machines course. .How does speed and torques and speed gets affected(major query)
NISHANT DUBEY's user avatar
1 vote
1 answer
41 views

Driving stepper motor with higher voltage

I have a DC Motor + Stepper FeatherWing and I am trying to drive a ST2018S0604-C stepper motor. The motor is rated at 3.9V and the specification of the motor driver TB6612 on the FeatherWing board ...
dreamcoder's user avatar
0 votes
1 answer
18 views

Pololu DRV8833 not working with pico

I am trying to use a Pololu DRV8833 driver to drive a DC motor via a pico. Below is the setup ...
user3553471's user avatar
0 votes
0 answers
22 views

Motor details - lead lugs and other items

I'm trying to evaluate a replacement motor using limited data from the existing motor. The vendor provided a motor datasheet, which includes some "special features", but the lines run ...
martij7's user avatar
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0 answers
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can a soft starter be used if the application requires high starting torque?

I want to use soft starter to protect the motor from high starting torque because the motor is set to start via DOL quite frequently. But wondering whether the application requires high starting ...
Udit Nambiar's user avatar
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0 answers
53 views

Vending machine motor working [duplicate]

I am trying to fix a vending machine motor and trying to run it directly without a microcontroller to understand its working, but I am not able to get it working. The motor has 6 terminals: T1 and T2 ...
Shashank Kumar's user avatar
0 votes
1 answer
34 views

Small 12v relay for motor

I wanted to make an automated motor driver with a relay module. Can I use this given relay to switch my motor. The motor is a 1/2 HP single phase centrifugal pump (240v 50hz AC). Is this given relay ...
Kokachi's user avatar
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3 votes
1 answer
61 views

What makes a round axle spin in a rotating magnetic field?

Consider a round electromagnetically featureless axle, i.e. an axle that possesses circular symmetry electromagnetically. This could be either an arbitrarily shaped axle, that has similar magnetic ...
tobalt's user avatar
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0 votes
1 answer
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BLDC six step commutation table confusion

What is the reason why there are many different six step commutation tables on the internet? No1 table No2 table Table reference: "https://lucidar.me/en/actuators/commutation-for-bldc-motors/&...
MSB's user avatar
  • 77
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0 answers
50 views

Electric bike battery shutdown under load

I have built a custom electric bike with the following components from Amazon. 48 V 25 Ah Battery Pack 48 V 1000 W Brush DC Motor 48 V 1000 W Controller The problem is the bike "shuts down" ...
Josh Kropf's user avatar
1 vote
1 answer
40 views

Locking BLDC motor rotor for encoder zeroing calibration

I know the title of this post is a real tong twister but my brain is in much worse condition as far as what's goin on here. Basically I have a motor that I'm installing an encoder onto so it can be ...
Dave2022's user avatar
0 votes
1 answer
46 views

Controlling motor with Raspberry Pi Pico and relays

I have a 12V motor which can be rotated forward or backward based on the polarity. I would like to control it with Raspberry Pi's GPIO ports. So that by switching 2 GPIO ports on Rpi I would be able ...
Martin819's user avatar
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1 vote
1 answer
63 views

Can I safely "home" a 24BYJ28 geared stepper by ramming it into the limit?

I am building a toolchanger for my 3D printer and I want to use a 24BYJ28 geared stepper motor for the tool changer. When I power up the machine, the machine doesn't know the current position of the ...
Dakkaron's user avatar
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0 votes
2 answers
139 views

Review my power MOSFET motor control circuit - rev6 - it works! (or does it?)

Software engineer dabbling in electronics here. Based on copious amounts of feedback from this community (and purchasing a copy of 'Art of Electronics, 3rd edition') it seems to work! Q1 and Q2 are P-...
cmc's user avatar
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0 votes
1 answer
38 views

Star delta connection blower motor

I have a star delta motor connection. I just want to confirm if the current from the motor going to the overload and contactor is the same as the contactor going to the breaker? Because the reading I ...
hisyam husseini's user avatar
1 vote
1 answer
53 views

How to increase the revolutions of the DC micromotor model 180 12 volts

I need to make the motor draw 12 volts and 2 amps at idle at 40,000 rpm. I don't know how to properly retrofit an existing model 180 DC micromotor. Specifically: What thickness to take the wire ...
Oleksandr 's user avatar
1 vote
1 answer
62 views

Need Guidance on a DIY crane project

I'm working on a DIY project and am in need of a little guidance with my circuit setup. Here is the setup: Motor: 12V, 0.6A, 10W (max output), Load current: 0.6A, Stall: 1.65A, Potentiometer/Switch: ...
Levair1968's user avatar
0 votes
0 answers
24 views

stator current in induction motor when load increases

When the load increases the speed of the rotor decreases and so the relative speed of the rotor and the magnetic field of the stator increase (slip increase). As a result, the induced emf will ...
Dimitris Charistes's user avatar
0 votes
1 answer
99 views

Questions About My Perpetual Motion Idea [closed]

Before you read any of this, this is just an idea. I am not an electrician, I am not a contractor, I am not a physicist, or anything like that. I just have an idea that i think could possibly work. I ...
DylDev's user avatar
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0 votes
0 answers
45 views

Scaling up a Motor

If I take a DDR motor (Direct Drive motor like a washing machine 3 phase DC motor) and make a larger version of it so the diameter is 2x and the magnets and coils are correspondingly wider for the ...
Oliver Walters's user avatar
0 votes
2 answers
51 views

How to wire a repurposed ac motor

I have an old garage door opener that I would like to repurpose. I would like to bypass the normal garage door logic and add an on-off-on switch. When switched to on1 rotates in direction 1, when ...
Jacob L's user avatar
2 votes
1 answer
79 views

Back EMF & Efficiency of a BLDC Motor

So I've recently designed and built a 3 phase, coreless, brushless DC synchronous motor. I'm trying to estimate its efficiency but struggling to figure out the equations. Specifically, how back EMF is ...
persona679's user avatar
0 votes
0 answers
42 views

Wiring AC 5 Wire Motor with 4 Phases to Run at Max

I'm trying to hardwire a fan motor to always run on max. Currently, it has a circuit board that allows you to adjust the speeds and requires a bit of fiddling to turn on and set the speed when the fan ...
KingLouis_CLXXII's user avatar
2 votes
3 answers
106 views

Review my power MOSFET motor control circuit - rev5

Software engineer dabbling in electronics here. With feedback from the previous iterations, I think I have something I can put on a breadboard without putting silicon particulate matter into the air. ...
cmc's user avatar
  • 267
0 votes
1 answer
45 views

Induction motors torque measurement

I am to calculate the running efficiency of a 3-Ph squirrel cage induction motor. I have the rated data for the motor. I have the load speed of the motor but I need output torque to calculate the ...
Udit Nambiar's user avatar
1 vote
3 answers
98 views

Salvage Washer Motor [closed]

I’m trying to salvage the motor of a WFW96HEAC Whirlpool washing machine. It has three wires: black, brown, & white. When I attach any two wires directly to a 120v electric line, the motor shakes ...
David Moritz's user avatar
3 votes
2 answers
969 views

Review my power MOSFET motor control circuit - rev4

Software engineer dabbling in electronics. Based on previous feedback, here's a simplified discrete motor controller including part details. This is an H-bridge with IRF9Z34N N-channel mosfets Q3 and ...
cmc's user avatar
  • 267
0 votes
1 answer
30 views

Not able to understand S2-5’ in IPM motor datasheet?

I am working on an electric go-kart, the only specs of the motor I have are: Motor type: IPM, Operating voltage: 48V, Nominal power: 6kw, Peak Power: 8.5kw, Peak motor torque: 42Nm, Max rpm: 6700, ...
naman sanghvi's user avatar
0 votes
0 answers
68 views

How can I smooth the output of a DC motor used as a generator?

I have a small DC motor acting as a generator, spinning at 500RPM. From it, I get 1V with ½V ripple, which a 1000uF electrolytic capacitor smooths nicely. I may wish to drive the motor in reverse, ...
GrahamRounce 's user avatar
0 votes
2 answers
100 views

Review my power MOSFET motor control circuit - rev3

Software engineer dabbling in electronics. Based on previous feedback, here's my latest revision of a simple fully discrete motor driver. MCU is a raspberry pi with GND output pins O1 and O2. Q1 and ...
cmc's user avatar
  • 267
0 votes
1 answer
34 views

Creating higher voltage from DC motor

I have a DC motor (5 V, 600 rpm). I use it as a generator. It produces near 1.5 V max. This voltage may differ while using it in the application and I can't control it. I want to raise this voltage to ...
Ritage Elsayed's user avatar

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